First Steps

Mouse wheel	change slice
Ctrl + Mouse wheel	zoom
Right mouse button (hold down)	pan
Left mouse buttom click	change position of crosshair (world position)
Middle mouse button	Change windowing
Ctrl + Left Mouse button hold	Reformatting MPR (rotation/translation) , see Navigation Tool

1-6,0	shortcuts to standard CT windowings
Space	toggle ROI edit, see ROI tool
s	open settings window
x,y	decrease/increase scroll speed
arrow up/down	change subject (when using autoloader)
(shift) Ctrl-Z	Undo/Redo ROI drawing